GM Service Manual Online
For 1990-2009 cars only
  1. Position an appropriate drain pan under the engine.
  2. Remove the oil pan drain bolt and allow oil to drain from the oil pan.

  3. Object Number: 236040  Size: SH
  4. Remove the oil filter.
  5. Remove coolant jacket drain plug and allow coolant to drain from the water jacket.
  6. Notice: Refer to Fastener Notice in the Preface section.

  7. Install oil pan drain bolt and the coolant jacket plug.
  8. Tighten
    Tighten the oil pan drain bolt to 35 N·m (26 lb ft).

    Tighten
    Tighten the water jacket plug to 25 N·m (18 lb ft).

  9. If cleaning or repairing the engine block, it is not necessary to reinstall the plugs.